Plastic material.



l t g ifi Os; COMPOSITIONS, J30

i,. W1 COATING R PLASTIC. p

9 3 wa Ma lzy'qdlimtfii UNITED STATES PATENT OFFICE,

CHBESTEN TOBBEN EADSEN, OF OAKLAND, CALIFORNIA.

PLASTIC MATERIAL.

1,269,946. R0 Drawing.

To all whom it may concern:

Be it known that I, CHRESTEN T. MADSEN, a citizen of the United States,residing at Oakland, in the county of Alameda and State of California,have invented new and useful Improvements in Plastic Materials, of whichthe following is a specification.

This invention relates to compositions for building materials and aprocess for producing same, and has for its object to produce a hard,tough composition of this sort which is impervious to moisture,comparatively light and inexpensive, and suitab e for use as a plaster,mortar or as a plastic material to be molded into building blocks, etc.The composition has also been found very efi'ective as a waterproofcovering for roofs.

In carrying out the invention, a mortar composed of mineral constituentsis mixed with fibrous materials in a finely divided condition, such assawdust, shavings, etc., which have first been impregnated with certainvegetable oils and resinous substances. The preferred way of making thecomposition is to prepare an impregnating liquid by boiling together inwater, one part by volume, of resinous substances, preferably fir o;

w two parts plants having muclaginous qualities preferably mallows and80 four parts 222% such as eucalyptus m tree leaves or ar 'Ihepreparation of this liquid could be *Naried in several ways, such as bysubstituting a suitable amount of resin for the pine 85 or fir leaves.The fibrous material to be used is thoroughly soaked in the liquid thusprepared an then dried to permit all the ingredients of t mposition tobe mixed while dry and thus facilitate transportation 40 before use. Thecomposition is completed by adding to four parts of r ar .matgri'lal!four parts of W four parts raulic cem nt an two parts coarse Thesesubstances are thoroughly mlxed' with suflicient water to form a plasticmass of the desired consistency, which can then be molded into suitableshapes or used as a laster.

Widen dry, the composition has compara- Speciflcation of Letters Patent.

Patented June 18, 1918.

tively little we ht and yet is exceedingly hard, tough an impervious tomoisture. The treated fibrous material serves, of course, to providebulk with little wei ht but, because of its special preparation, it asadditional functions as well. The mucilaginous properties produced bythe preparation assist in giving cohesion while the resinous substancesharden the composition and, together with the oily materials, make thesawdust u I rvious to moist prevent its emexposed the weather.

Having thus described my invention, what I claim and desire to secure byLetters Pat ent is- 1. A process of making a composition of thecharacter described, which consists in impregnating fibrous materialswith a liquid reS1I10 l .910 .n constituents, an mixing said impregnatedfibrous material with a mineral cement.

2. A process of making a composition of the character described, whichconsists in impregnating fibrous materials with a liquid havingresinous, mucilaginous, and terebic constituents, and mixing saidimpregnated fibrous material with a mineral cement.

3. A process of making a composition of the character described, whichconsists in impregnating fibrous materials with aliquid having resinousmucilaginous, and terebic constituents. an mixing four parts of saidimpregnated fibrous material with four parts sand, four parts cement,and two parts slaked lime.

4. A composition of matter composed of cement into which a comminutedfibrous material is mixed, said material having been treated in a liquidhaving resinous and mucilaginous constituents, to which are added a.terebic element and a proportion of sand.

5. A composition of matter composed of four parts cement, four partsslaked lime, two parts sand, and four parts sawdust, said sawdust havingbeen treated in a liquid made by boiling two parts mucilaginous plants,one part resinous substances, and four parts terebic wood in water.

6. A composition of matter composed of In testimony whereof I havehereunto set four parts cement, four parts slaked lime, my hand in thepresence of two subscribing two arts sand, and four parts sawdust, saidwitnesses.

saw ust having been treated in a liquid CHRESTEN TORBEN MADSEN. 5 made bboiling two parts mallows, one part Witnesses:

fir nee es, an four parts eucalyptus .gum .JOHN H. HEBRING,

leaves and bark, in water. .W. W. HEALEY.

Copies of this patent my be obtained for the cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

